[build] Add missing mapSourceURI for `scala-library-sjs` project#24450

WojciechMazur merged 1 commit intoscala:mainscala/scala3:mainfrom

WojciechMazur:build/scala-library-sjs-mapsourceWojciechMazur/dotty:build/scala-library-sjs-mapsourceCopy head branch name to clipboard